pp. 429-434
S&M1010 Research Paper of Special Issue https://doi.org/10.18494/SAM.2014.979 Published: July 29, 2014 Dependence of GaN Removal Rate of Plasma Chemical Vaporization Machining on Mechanically Introduced Damage [PDF] Yasuhisa Sano, Toshiro K. Doi, Syuhei Kurokawa, Hideo Aida, Osamu Ohnishi, Michio Uneda, Kousuke Shiozawa, Yu Okada and Kazuto Yamauchi (Received April 15, 2014; Accepted June 10, 2014) Keywords: hard-to-machine material, atmospheric-pressure plasma, PCVM, damaged layer, GaN
A high-efficiency planarization method combining atmospheric-pressure plasma etching [plasma chemical vaporization machining (PCVM)] and mechanical polishing is proposed. The convex part of a substrate surface, considered to be affected by mechanical action, is removed preferentially by PCVM. However, it is not evident whether the PCVM removal rate of the damaged layer of a gallium nitride (GaN) substrate increases. In this study, the dependence of removal rate on removal depth is investigated using a GaN substrate with a damaged layer. As a result, the removal rate of the damaged layer is observed to be three or four times greater than that of deep undamaged layers.
Corresponding author: Yasuhisa SanoCite this article Yasuhisa Sano, Toshiro K. Doi, Syuhei Kurokawa, Hideo Aida, Osamu Ohnishi, Michio Uneda, Kousuke Shiozawa, Yu Okada and Kazuto Yamauchi, Dependence of GaN Removal Rate of Plasma Chemical Vaporization Machining on Mechanically Introduced Damage, Sens. Mater., Vol. 26, No. 6, 2014, p. 429-434. |